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首页> 外文期刊>Journal of Applied Polymer Science >Characterization of hydrogels based on chitosan and copolymer of poly(dimethylsiloxane) and poly(vinyl alcohol)
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Characterization of hydrogels based on chitosan and copolymer of poly(dimethylsiloxane) and poly(vinyl alcohol)

机译：基于壳聚糖的水凝胶的表征以及聚二甲基硅氧烷和聚乙烯醇的共聚物

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摘要

Copolymers composed of poly(vinyl alcohol) (PVA) and poly(dimethylsiloxane) (PDMS) were crosslinked with chitosan to prepare semi-interpenetrating polymer network (IPN) hydrogels by an ultraviolet (UV) irradiation method for application as potential biomedical materials. PVA/PDMS copolymer and chitosan was cast to prepare hydrogel films, followed by a subsequent crosslinking with 2,2-dimethoxy-2-phenylacetophenone as a nontoxic photoinitiator by UV irradiation. Various semi-interpenetrating polymer networks (semi-IPNs) were prepared from different weight ratios of chitosan and the copolymer of PVA/PDMS. Photocrosslinked hydrogels exhibited an equilibrium water content (EWC) in the range of 65-95%. Swelling behaviors of these hydrogels were studied by immersion of the gels in various buffer solutions. Particularly, the PCN13 as the highest chitosan weight ratio in semi-IPN hydrogels showed the highest EWC in time-dependent and pH-dependent swelling. (C) 2002 Wiley Periodicals, Inc. [References: 19]
机译：将由聚乙烯醇（PVA）和聚二甲基硅氧烷（PDMS）组成的共聚物与壳聚糖交联，通过紫外线（UV）辐照法制备半互穿聚合物网络（IPN）水凝胶，以用作潜在的生物医学材料。浇铸PVA / PDMS共聚物和壳聚糖以制备水凝胶膜，随后通过UV辐射与作为无毒光引发剂的2，2-二甲氧基-2-苯基苯乙酮进行随后的交联。由壳聚糖和PVA / PDMS共聚物的不同重量比制备了各种半互穿聚合物网络（semi-IPN）。光交联的水凝胶表现出65-95％的平衡水含量（EWC）。通过将凝胶浸入各种缓冲溶液中，研究了这些水凝胶的溶胀行为。特别是，PCN13作为半IPN水凝胶中最高的壳聚糖重量比，在时间依赖性和pH依赖性溶胀中显示出最高的EWC。 （C）2002 Wiley Periodicals，Inc. [参考：19]

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